/*
* linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
*
* Author: Nicolas Pitre
* Created: Dec 02, 2004
* Copyright: MontaVista Software Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/dmaengine.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/pxa2xx-lib.h>
#include <sound/dmaengine_pcm.h>
#include <mach/regs-ac97.h>
#include <mach/audio.h>
#include "pxa2xx-pcm.h"
static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
{
if (!pxa2xx_ac97_try_cold_reset(ac97)) {
pxa2xx_ac97_try_warm_reset(ac97);
}
pxa2xx_ac97_finish_reset(ac97);
}
static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
.read = pxa2xx_ac97_read,
.write = pxa2xx_ac97_write,
.reset = pxa2xx_ac97_reset,
};
static unsigned long pxa2xx_ac97_pcm_out_req = 12;
static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
.addr = __PREG(PCDR),
.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
.maxburst = 32,
.filter_data = &pxa2xx_ac97_pcm_out_req,
};
static unsigned long pxa2xx_ac97_pcm_in_req = 11;
static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
.addr = __PREG(PCDR),
.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
.maxburst = 32,
.filter_data = &pxa2xx_ac97_pcm_in_req,
};
static struct snd_pcm *pxa2xx_ac97_pcm;
static struct snd_ac97 *pxa2xx_ac97_ac97;
static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
pxa2xx_audio_ops_t *platform_ops;
int r;
runtime->hw.channels_min = 2;
runtime->hw.channels_max = 2;
r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
snd_pcm_limit_hw_rates(runtime);
platform_ops = substream->pcm->card->dev->platform_data;
if (platform_ops && platform_ops->startup)
return platform_ops->startup(substream, platform_ops->priv);
else
return 0;
}
static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
{
pxa2xx_audio_ops_t *platform_ops;
platform_ops = substream->pcm->card->dev->platform_data;
if (platform_ops && platform_ops->shutdown)
platform_ops->shutdown(substream, platform_ops->priv);
}
static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
}
static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
.playback_params = &pxa2xx_ac97_pcm_out,
.capture_params = &pxa2xx_ac97_pcm_in,
.startup = pxa2xx_ac97_pcm_startup,
.shutdown = pxa2xx_ac97_pcm_shutdown,
.prepare = pxa2xx_ac97_pcm_prepare,
};
#ifdef CONFIG_PM_SLEEP
static int pxa2xx_ac97_do_suspend(struct snd_card *card)
{
pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
snd_pcm_suspend_all(pxa2xx_ac97_pcm);
snd_ac97_suspend(pxa2xx_ac97_ac97);
if (platform_ops && platform_ops->suspend)
platform_ops->suspend(platform_ops->priv);
return pxa2xx_ac97_hw_suspend();
}
static int pxa2xx_ac97_do_resume(struct snd_card *card)
{
pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
int rc;
rc = pxa2xx_ac97_hw_resume();
if (rc)
return rc;
if (platform_ops && platform_ops->resume)
platform_ops->resume(platform_ops->priv);
snd_ac97_resume(pxa2xx_ac97_ac97);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
static int pxa2xx_ac97_suspend(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
int ret = 0;
if (card)
ret = pxa2xx_ac97_do_suspend(card);
return ret;
}
static int pxa2xx_ac97_resume(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
int ret = 0;
if (card)
ret = pxa2xx_ac97_do_resume(card);
return ret;
}
static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
#endif
static int pxa2xx_ac97_probe(struct platform_device *dev)
{
struct snd_card *card;
struct snd_ac97_bus *ac97_bus;
struct snd_ac97_template ac97_template;
int ret;
pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
if (dev->id >= 0) {
dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
ret = -ENXIO;
goto err_dev;
}
ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
THIS_MODULE, 0, &card);
if (ret < 0)
goto err;
strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
if (ret)
goto err;
ret = pxa2xx_ac97_hw_probe(dev);
if (ret)
goto err;
ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
if (ret)
goto err_remove;
memset(&ac97_template, 0, sizeof(ac97_template));
ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
if (ret)
goto err_remove;
snprintf(card->shortname, sizeof(card->shortname),
"%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
snprintf(card->longname, sizeof(card->longname),
"%s (%s)", dev->dev.driver->name, card->mixername);
if (pdata && pdata->codec_pdata[0])
snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
ret = snd_card_register(card);
if (ret == 0) {
platform_set_drvdata(dev, card);
return 0;
}
err_remove:
pxa2xx_ac97_hw_remove(dev);
err:
if (card)
snd_card_free(card);
err_dev:
return ret;
}
static int pxa2xx_ac97_remove(struct platform_device *dev)
{
struct snd_card *card = platform_get_drvdata(dev);
if (card) {
snd_card_free(card);
pxa2xx_ac97_hw_remove(dev);
}
return 0;
}
static struct platform_driver pxa2xx_ac97_driver = {
.probe = pxa2xx_ac97_probe,
.remove = pxa2xx_ac97_remove,
.driver = {
.name = "pxa2xx-ac97",
#ifdef CONFIG_PM_SLEEP
.pm = &pxa2xx_ac97_pm_ops,
#endif
},
};
module_platform_driver(pxa2xx_ac97_driver);
MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa2xx-ac97");